GammaVision
®
v7 (A66-BW) 783620H / 1013
5.8.4. Mark Peak
This function marks an ROI in the spectrum, at the marker position, in one of two ways.
! If the spectrum is calibrated, the region is centered on the marker with a width of three times the calibrated FWHM. There does not need to be a peak at the marker position.
! If the spectrum is not calibrated, the region is centered on the peak located within two channels of the marker and as wide as the peak. If the peak search fails, or if the peak is not well-formed, no ROI is marked. There is no limit on the size of a peak or ROI; therefore, in some uncalibrated spectra, large ROIs might be marked.
ROIs can also be marked this way with the ROI Ins button on the Status Sidebar, the Mark
ROI button on the toolbar, Keypad<Ins>, and <Insert>. See also Mark ROI on the rightmouse-button menu, Section 5.11.8.
5.8.5. Clear
This clears the ROI bits of all ROI channels contiguous to the channel containing the marker.
This is duplicated by the ROI Del button on the Status Sidebar, Keypad<Del>, the <Delete> key, and the Clear ROI toolbar button. See also Clear ROI on the right-mouse-button menu.,
Section 5.11.9.
5.8.6. Clear All
This resets all the ROI bits in the displayed spectrum (i.e., removes all ROI markings from the spectrum). However, it does not affect the ROI status of Mark/Unmark/Off.
5.8.7. Auto Clear
When this option is active (click to display a checkmark beside it) and you perform a peak search (see Section 5.5.2), all existing ROIs are cleared from the spectrum before the search is performed.
5.8.8. Save File...
This allows you to save to disk a table of the channel numbers, for the current spectrum, that have the ROI set. The contents of the spectrum are not changed.
Selecting Save File... opens a standard file-open dialog. Enter the File name. The default file extension is
.ROI
. If the file already exists, the system ask if you want to overwrite the data in the existing file or cancel the save. Click on OK to overwrite the file.
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